Changed spawn system

core/src/io/anuke/mindustry/entities/EnemySpawn.java

@@ -0,0 +1,18 @@
+package io.anuke.mindustry.entities;
+
+import io.anuke.mindustry.entities.enemies.Enemy;
+
+public class EnemySpawn{
+	public final Class<? extends Enemy> type;
+	int before = Integer.MAX_VALUE;
+	int after;
+	int spacing;
+	
+	public EnemySpawn(Class<? extends Enemy> type){
+		this.type = type;
+	}
+	
+	public int evaluate(int wave, int lane){
+		return 0;
+	}
+}